Class TypeExtensions

Various extension methods for type reflection.

Inheritance

object

TypeExtensions

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: DotNext.Reflection

Assembly: DotNext.dll

Syntax

public static class TypeExtensions

Methods

Cast(Type, object?)

Casts an object to the class, value type or interface.

Declaration

public static object? Cast(this Type type, object? obj)

Parameters

Type	Name	Description
Type	type	The type cast result.
object	obj	The object to be cast.

Returns

Type	Description
object	The object after casting, or null if obj is null.

Exceptions

Type	Condition
InvalidCastException	If the object is not null and is not assignable to the type; or if object is null and type is value type.

Devirtualize(Type, MethodInfo)

Returns method that overrides the specified method.

Declaration

public static MethodInfo? Devirtualize(this Type type, MethodInfo abstractMethod)

Parameters

Type	Name	Description
Type	type	The type that contains overridden method.
MethodInfo	abstractMethod	The abstract method definition.

Returns

Type	Description
MethodInfo	The method that overrides abstractMethod.

GetBaseTypes(Type, bool, bool)

Returns read-only collection of base types and, optionally, all implemented interfaces.

Declaration

public static IEnumerable<Type> GetBaseTypes(this Type type, bool includeTopLevel = false, bool includeInterfaces = false)

Parameters

Type	Name	Description
Type	type	The type to be discovered.
bool	includeTopLevel	true to return type as first element in the collection.
bool	includeInterfaces	true to include implemented interfaces; false to return inheritance hierarchy only.

Returns

Type	Description
IEnumerable<Type>	Read-only collection of base types and, optionally, all implemented interfaces.

GetDefaultValue(Type)

Gets default value for the specified type.

Declaration

public static object? GetDefaultValue(this Type type)

Parameters

Type	Name	Description
Type	type	The type for which default value should be returned.

Returns

Type	Description
object	The default value of type type.

Remarks

The method returns null for all reference and pointer types and default boxed value for value types.

GetGenericArguments(Type, Type)

Returns actual generic arguments passed into generic type definition implemented by the input type.

Declaration

public static Type[] GetGenericArguments(this Type type, Type genericDefinition)

Parameters

Type	Name	Description
Type	type	The type that inherits from generic class or implements generic interface.
Type	genericDefinition	The definition of generic type.

Returns

Type	Description
Type[]	The array of actual generic types required by genericDefinition.

Examples

var elementTypes = typeof(byte[]).IsGenericInstanceOf(typeof(IEnumerable<>));
elementTypes[0] == typeof(byte); //true

IsAssignableFromWithoutBoxing(Type, Type)

Indicates that object of one type can be implicitly converted into another without boxing.

Declaration

public static bool IsAssignableFromWithoutBoxing(this Type to, Type from)

Parameters

Type	Name	Description
Type	to	Type of conversion result.
Type	from	The type check.

Returns

Type	Description
bool	true if from is implicitly convertible into to without boxing.

Examples

typeof(object).IsAssignableFrom(typeof(int)); //true
typeof(object).IsAssignableFromWithoutBoxing(typeof(int)); //false
typeof(object).IsAssignableFrom(typeof(string));    //true
typeof(object).IsAssignableFromWithoutBoxing(typeof(string));//true

See Also

IsAssignableFrom(Type)

IsGenericInstanceOf(Type, Type)

Determines whether the type is an instance of the specified generic type.

Declaration

public static bool IsGenericInstanceOf(this Type type, Type genericDefinition)

Parameters

Type	Name	Description
Type	type	The type to check.
Type	genericDefinition	Generic type definition.

Returns

Type	Description
bool	true, if the type is an instance of the specified generic type; otherwise, false.

Examples

typeof(byte[]).IsGenericInstanceOf(typeof(IEnumerable<>));    //returns true
typeof(List<int>).IsGenericInstanceOf(typeof(List<int>));   //returns true

IsImmutable(Type)

Determines whether the type is read-only (immutable) value type.

Declaration

public static bool IsImmutable(this Type type)

Parameters

Type	Name	Description
Type	type	The type to inspect.

Returns

Type	Description
bool	true, if the specified type is immutable value type; otherwise, false.

IsUnmanaged(Type)

Determines whether the type is unmanaged value type.

Declaration

public static bool IsUnmanaged(this Type type)

Parameters

Type	Name	Description
Type	type	The type to inspect.

Returns

Type	Description
bool	true, if the specified type is unmanaged value type; otherwise, false.